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Topic Review (Newest First)

02-24-2013 09:41 PM

alpha

im running a stock size 16 tire, and today over a 250mi round trip i was getting 39mpg, my car is stock other than wheels and magnaflow exaust. and almost dead tires. so when i get new tires, i expect my city range to go up, and a hair in the high way miles

that was with my and a friend, together weighing 450lbs plus my 3 year old son with his car seat, and my 65lb tool box and a detail bag

i use a SG2 to monitor my Throttle position, on level ground to make 65, my throttle is at no more than 38% that was with a head wind. i never took it over 3krpm, was not drafting, and was in no hurry to keep up with traffic. my temp was 222f deg, window half open with no fan on, no ac, no headlights, i did have my stereo on with no amps.

im not a hypermiler, just giving you the stats on it, it was a good challange, but id rather go fast

02-24-2013 07:44 PM

JFrye

Since my speedometer is off due to running smaller than stock tires(less than 6200 miles on a 70,000 mile tire, so wont be replacing these anytime soon as previousily mentioned), at 74 on the dash I am actually running 70 on the GPS. So at 74 on the dash, Im right around 2900-3000 on the tach. With the dash reading 79-80mph, where it normally is because I hate getting up in the morning, is right around 3200-3300rpm. I drive TO work not for work. I cant take my backseats out though, because I get my son every other weekend and Im not willing to take the seats out, just to put them back in 10 days later. To me its not worth that little gain in MPG to do that.

I just had a 18 inch long 2.5 inch glasspack installed in the exhaust, and I honestly dont THINK I have changed my driving style(maybe I have), but I am now seeing closer to 25MPG now.

Also, with the speedometer being off, I have done the math, for every 100 miles I drive I need to subtract 5 miles off what the trip meter says. So if I go 200 miles on 10 gallons, then in reality, I went 190 miles. So even though my last fillup said I went 258.8 miles, I really went 248.8, netting me almost 25mpg. I also do not have cruise control, but in normal conditions, I have gotten pretty good at keeping the speed with 2mph at all times. As for the A/C, I never use that in the summer unless my son is with me. I prefer the windows down if I can.

02-23-2013 11:50 AM

Fluffy6079

Quote:

Originally Posted by tmittelstaedt

Besides, if you have a thumpin stereo might as well give the populace exposure to decent music instead of top 40. :-)

And, no. Never do this, unless your goal is to look like a complete d-bag.

02-23-2013 11:47 AM

Fluffy6079

Yeah, your best bet is to simply slow down and try not to drive aggressively. I drive 80 miles or more a day and manage about 32 MPGs averaging between 65-70 MPH. I've done my commute at 55 MPH for a whole tank and actually managed 35 MPGs. Your driving style is going to be the biggest factor in the mileage you get, unless there is just something really wrong with your car.

02-21-2013 01:54 AM

tmittelstaedt

I forgot this one earlier - air conditioning. The AC really knocks down the mileage - although at high speed it is better than opening a window. But at low speed - cruising in the city at 35 or under - it is probably better to turn the AC off and open the windows wide. Besides, if you have a thumpin stereo might as well give the populace exposure to decent music instead of top 40. :-)

And don't forget the defroster turns on the AC. You can override that and turn on defrost then turn off ac. it will take longer to clear the windows of course.

02-20-2013 01:50 PM

Magus2727

when they need to be replaced also go with skinny tire.

Remove the spare, most insurance companies have free road side assistance.

Get a vacuum gauge (usually also paired with a boost but you don't care about that) and when driving try to keep the vacuum as high as possible = better MPG.

You could get extreme and look at shaving your antenna on the roof and smooth that out. Perhaps see what you can do to tuck in the side mirrors. if skilled with body work you can install covers over the rear wheels to keep the body lines spokes on rims cause air turbulence can also look at new light weight rims that a solid faced (ford even has "convertible" rims on their new F-150 concept)

02-20-2013 01:19 PM

150mphzetec

your biggest culprit here is the ATX. If you have CC use it as often as possible. Also make sure that your tires are always properly inflated

02-20-2013 01:00 PM

DrkKnight614

Quote:

Originally Posted by tmittelstaedt

OK your looking for MPG, let me tell you some facts, here.

1) You will never get the best MPG if your throttle is EVER at WOT. If your highway cruising, your throttle is barely cracked open. That means all the porting and suchlike does NOTHING. Porting makes no difference unless your at WOT. So do most of the go-fast stuff on the car does absolutely nothing.

2) For best MPG you want to have the car at the lowest RPM at all times. Meaning that when shifting you get the car up into the highest gear as quick as possible. And also meaning that you want the tallest gears possible. Your 3.90 axle ratio coupled with 14" wheels is a problem here. What does your RPM run at when your at 70Mph? I'd bet it's pretty high.

3) If your running a catcon, then you have very little choice in fuel mixture because while the engine will be perfectly happy running on a leaner mixture, you will burn up your catcon.

4) remove weight from the car. You said you drive for work - well do you haul passengers around and people? If not, remove your seats and put them in the garage.

5) lowering is good for MPG.

6) reduce speed. Sorry to say this but I'll give you the following challenge. For 1 tank of gas, do not drive faster than 55Mpg on the whole tank. Then check MPG.

7) Does your car have a trunk mounted spoiler bar? If so, remove it - those are MPG sucks. Spoilers work by pulling energy away from going forward and converting it to downward pressure.

8) fuel is wasted every time you apply the brakes. Be forward-looking and pull your foot off the throttle way, way, way in advance of an intersection and coast to the red light.

Agreed, I'm getting around the same mpgs with a mixed commute. People don't realize just how much more fuel they suck up when you start going past 55mph. It goes down dramatically, not alittle. The difference in fuel consumption between 55 or 60mph, compared to 70 is as much as 15-20% less mpg. If you fill up your tank and drive 70mph, you'll see the needle drop below the Full mark before you even hit 50 miles driven. But if you keep the speed down 60 or below, the needle will still be at the full mark.

Not sure what kind of roads you are driving on, maybe the speed limit is 65 or 70. If so go the slowest possible without pissing people off or becoming a danger on the road. But if its 55mph and you are just speeding, slow it down. You will see more MPG gains by far then any amount of mods will get you.

Getting the best out of your car is always about how you drive and keeping your car properly maintained.

02-18-2013 02:48 AM

tmittelstaedt

OK your looking for MPG, let me tell you some facts, here.

1) You will never get the best MPG if your throttle is EVER at WOT. If your highway cruising, your throttle is barely cracked open. That means all the porting and suchlike does NOTHING. Porting makes no difference unless your at WOT. So do most of the go-fast stuff on the car does absolutely nothing.

2) For best MPG you want to have the car at the lowest RPM at all times. Meaning that when shifting you get the car up into the highest gear as quick as possible. And also meaning that you want the tallest gears possible. Your 3.90 axle ratio coupled with 14" wheels is a problem here. What does your RPM run at when your at 70Mph? I'd bet it's pretty high.

3) If your running a catcon, then you have very little choice in fuel mixture because while the engine will be perfectly happy running on a leaner mixture, you will burn up your catcon.

4) remove weight from the car. You said you drive for work - well do you haul passengers around and people? If not, remove your seats and put them in the garage.

5) lowering is good for MPG.

6) reduce speed. Sorry to say this but I'll give you the following challenge. For 1 tank of gas, do not drive faster than 55Mpg on the whole tank. Then check MPG.

7) Does your car have a trunk mounted spoiler bar? If so, remove it - those are MPG sucks. Spoilers work by pulling energy away from going forward and converting it to downward pressure.

8) fuel is wasted every time you apply the brakes. Be forward-looking and pull your foot off the throttle way, way, way in advance of an intersection and coast to the red light.

02-11-2013 11:45 PM

1turbofocus

With the mods you have I would do a wide band air fuel gauge unless you never plan on going WOT
I would do a tune
180 deg thermostat
SP463 plugs gapped at .060

The tune it self may not do a lot for MPG but what it will do is bring your mods together and that might well gain some MPG , other mods listed will do the same

Tom

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